William b



(N0 Model.)

' W. B. SANDERS.

SURGICAL CHAIR,

lllllll ll Imm j f C7 @am No. 344,546. Patented June 29, 1886. y

UNITE STATES lPATENT OEEICE.

WiLLIAM B. sANDERs'oE LocK HAVEN, PENNSYLVANIA, AssieNon'fro JOHN L. 'THIELEL 0F SAME PLACE.

SURGICAL CHAIR.

sPBcrrIcATioN forming pair of Letters Patent No. 344,546, dated .rune 29,1886.

Application filed November l1. 1.885. Serial No. 182,493.

To all whom ,it may concern:

Be it known that l, WILLIAM B. SANDERS,

of Lock Haven, in the county of Clinton andx My main object is to aiford better conveniences for thesurgeon inl his operations .with.

out detracting from the comfort of the patient,

and at the same time produce a chair combining simplicity and cheapness in construc- :o tion, and one simple and easy to operate.

To these ends my improvements consist,es sentially, in a vertically-adjustable seat combined with a hinged back and apron, means connecting the back and apron, and means 2 5 vconn'ectin g the back and seat,whereby on lowering the back the arm-rests -are simultaneously lowered and both the back and apron `are' simultaneously raised and brought to a level in the saine horizontal plane with the 3o back, all as will be more fully hereinafter described and claimed. f

For the better ulnlerstanding of the construction and operation of the parts comprising this` chair attention is invited to the accompanying drawings, in which- Figure 1 is a side view of the same with parts broken away and parts in dotted lines, and Fig. 2 a similar view of the same as converted into a table or cot suitable for the operations of a surgeon upon a patient.

Like letters of reference denote corresponding part-s in both illustrations. A

A denotes a suitable supporting-frame having the usual legs and connecting-rangs and side pieces, and provided at its front with a proper foot-rest, A', and at its center with cross-pieces a c', respectively, connecting the rungs and side pieces, as shown.

B is the back of the chair,hinged to the back of this frame A; C, the vertically-adjustable seat which normally sets in the open upper No model.)

end of said frame, and D the apron which is hinged to the front edge of this seat, all of which parts should beoomortabl y upholstered The arm-rest E, at each side of the chair, is 5 5 secured to and supported by a lever, e, having a bent-up curved rear end, which is pivoted to the side edge of the chair-back Bsonie distance above its lower edge, and a bentdown curved front end having a forked eX- 6o tremity between which is pivoted the upper end of an upright arm,.f, secured .to thev side edge of .the apron D. Bythis means of connection ybetween the back B and apron D it will be apparent that when the former is lowered the latter will be simultaneously raised and t11earm--rests`EE` likewise lowered toa i level with the chair-back. Y

rlhe seat C, which should be properly cut and tenoned-toit snugly within the open np 7g Y per end of the frame A, is mounted or secured at its center upon the upper end of a post, F, which' post may be either round or square, or

of some othershape,and passes freely through and is guided by suitable holes or openings made in the u-pper andlower cross-pieces,a a', respectively, of the'frame A. This post E is slotted vertically at or about its center,` to receivethe inner end of a lever, G, which is attached to a link, h, pivoted within the slot of 8o said post by means of a suitable pin or-bolt,

h. This lever G passes through and is fule crurned in another slotted post or bracket, H, depending from the top cross-piece, a, and at its outer lend is pivoted in the slotted lower endof an arm or brace, G,which extends upward,and is hinged or pivoted at its upper end to the center of the chair-back B." From this connection between the seat and back of the chair it will be evident that whenthe back is 9o' lowered the seat will be simultaneously raised to a level with the same, bringing the patient y higher and within a more convenient reach of the surgeon. Y l

To adjust the chair-back to any desired inclination between its vertical and horizontal limits, the post F, which supports the seat C, is provided with a vertical series of holes or perforations, k, with which engages or is adapted to be engaged a spring-actuated lockingbolt, I, arranged horizontally below the seat()y and passing through one side of the frame A claim, and desire to secure by and into the upper cross-piece, a, as far as the post F. This bolt is provided on its outer end with a ring or other appropriate handle, I', for withdrawing it from engagement withv any one of t-he holes or perforations k when it is d esired tn change the inclination of the chair-back.

An objection characteristic with other chairs of this class has been that when converted into a table or -cot for surgical operations the arm-rests, instead of being lowered to the same level with the table, have invariably projected above the same, and to such an extent as to se: rionslyinterfere with the work of the'surgeon; and,fnrthermore, the table has alwaysbeen too low for convenience in performing surgical operations, and hence I have devised the within-described means for overcoming these objectons, and in doing so have dispensed with the many complicated devices for adjusting the chairto variouspositions,and have adapted the chair to be changed into these various positions by simply lowering or depressi ng its back under proper control of the locking-bolt.

Another very important feature connected u with this chair is that when the seat is in its normal position the distance to the foot-rest is the same asin ordinary chairs, thus giving the same ease and comfort to an invalid as the ordinary easy-chair, and yet enabling the surgeon to raise his patient higher and within a more convenieutreach for operation than can be done with other chairs ot' this class.

I am aware that it is not new to provide' a chair with arm-rests having pivotal connections with a Vpivoted back and a pivoted leg' rest or apron, and therefore do not broadly claim such combination; but,

Having thus described my invention, what I Letters Patent, is

1. In a chair of the character described, the combination, with a back hinged to the frame, a vertically adjustable seat, and an apron hinged to said seat, of a pair of arm-rests having pivotal connectionsv with the back and apron, and a post supporting said seat and having intermediate lever connections with the back, whereby the several parts are brought to the same level in a horizontal plane by lowering the back, substantially'as described.

2. In a chair of thecharacter described, the combination, with the back' B, hinged to the frame, the seat C, supported by a post having intermediate lever connections with the back,

arms f f, secured to the sides of said apron, and the armrest levers c e, with bent-up4 rear ends pivoted to the sides of the chair-back, and with bentdown front ends pivotally attached to the upper ends of the arms f f, substantially as and for the purposes set forth.

3. In a chair of the character described, the combination, with the hinged back B, seat C, and hinged apron D, of the perforated post F, supporting said seat and moving in guides of the chairfrarne, and the spring-actuated sliding bolt I, adapted to engage with the perforations of said post, substantially as and for the purposes set forth. y

4. In a chair ofthe character described, the combination, with the hinged back B and seat C, of the slotted post F, lever G arm or brace G', post H, and link h, substantially as de scribed and shown.

In testimony whereofI affix my signature in presence of two witnesses.

XVILLIAM B. SANDERS.

Witnesses:

A. W. BEMAN,

O. B. SHAFFER.

and the apron D, hinged to said seat, orf the 55 

